Haas & Hahn is the working title of artistic duo Jeroen Koolhaas and Dre Urhahn. Jeroen Koolhaas graduated from the Design Academy in Eindhoven, with a specialization in Graphic Design. Since his graduation he has been working as a freelance audio-visual designer and illustrator for the New Yorker. Dre Urhahn has worked as a journalist, copywriter and art director, and has set up several companies in the event sector and television production. In 2005 they began a partnership when they made a documentary about hip hop for MTV in the favelas of Rio de Janeiro and Sao Paolo. This visit has inspired them a lot. They decided to go back to Brazil to create huge wall paintings in the slums in cooperation with the youth living in these favelas.